Differential



May 7, 1940. BUSH 2,200,153

DIFFERENTIAL Filed Aug. 2, 1938 2 Sheets-Sheet 1 Ear] 192/572 0R ATTORNEYS y 1940- l E. BUSH 2.200.153

DIFFERENTIAL Filed Aug. 2, 1938 2 Sheets-Sheet 2 ilk // i Z/SZZ. INVENTOR W By Wfimfikmrg ATTO RN EYS Patented May 7, 1940 PATENT OFFICE DIFFERENTIAL Earl Bush, Fern, Wis. 1

Application August 2,

2 Claims.

My invention relates to the transmission of power and has among its objects and advantages the provision of an improved differential mechanism designed to proportion power between multiple power take-offs.

In trucks of the four-wheel drive type and other machinery, it is frequently highly desirable to distribute power unevenly with respect to the front and rear traction wheels. In such trucks, as well as other types of machinery employing a differential and multiple power take-offs, it is important that the distribution of power be divided in proportion to the demands of the individual power take-offs. As an example, in trucks of the four-wheel drive type the rear wheels may be characterized by a greater tractive capacity, but if the power is evenly divided between the front and rear tractive wheels, the power is unevenly divided to the degree where the rear tractive wheels will be underpowered and the front tractive wheels overpowered. It is, therefore, an object of the present invention to provide a differential for connection with a multiple power take-off system in which the differential is so constructed as to proportionately divide the power on the basis of the work performed by the individual power take-offs.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view of a differential constructed according to my invention;

Figure 2 is a sectional view along the line 2--2 of Figure 1;

Figure 3 is a sectional view of a different form of my invention;

Figure 4 is a sectional view along the line 44 of Figure 3; and

Figure 5 is a sectional view along the line 5-5 of Figure 3.

In the embodiment selected to illustrate my in- Vention, I make use of a differential housing I8 including a cylindrical body l2 and end plates I4 and I6. Plates I4 and I8 are connected with the ends of the body l2 by bolts l8 and 28, respectively. To one end of the differential housing I8 I connect a bevel gear 22 which is made secure by the bolts I8. Bevel gear 22 is driven in the manner of conventional differential drives.

To the inner face of the plate I4 I mount a case 24 which is made up of sections 26 and 28. Sections 26 and 28 are connected into a unitary structure by bolts 38, which bolts also extend through the plate I4 for anchoring the case 24 thereto. Bolts 32 are also employed for additionally anchoring the case 24 to the plate I4.

1938, Serial No. 222,706 (01. '74j s11) Plate l4 includes an opening 34 for accommodating the hub 38 of a gear 38 keyed to a shaft 48, as at 42. Plate I6 is provided with a fixed gear 44 having an opening 46 for loosely receiving the shaft 48. Upon the shaft 48 I mount a collar 58 which is formed integrally with gears 52 and 54. Collar-58 is loosely related tothe shaft 48.

Sections 26 and 28 are recessed at 56 to define openings for the reception of shafts 58 upon which pinions 68 are mounted and arranged in mesh with the gears 38 and 52. Shafts 58 are attached to and project radially from a ring 62 which loosely embraces the shafts 48 and 48. Upon the shaft 48 I mount a ring 69 which is keyed to the shaft, as at 66.. Ring 69 carries shafts 68 upon which gears I8 are mounted and arranged in mesh with the gears 54 and 44. The outer ends of the shafts 68 are supported by a ring I2 made up of sections 14 connected into a unitary structure by bolts I6. Sections I4 are recessed at I8 to define openings for connection with the shafts 88, but the ring I2 is of a floating nature and is effective for holding the gears I8 in mesh with the gears 54 and 44.

Shafts 48 and 48 constitute power take-offs for operating different units such as the rear and front wheels of a four-wheel drive. Power applied to the transmission case I8 through the me- I dium of the gear 22 is transmitted to the case 24. Such power is transmitted to the gears 68 and is divided equally between the gears 38 and 52. Gear 36 is keyed to the shaft 48, while gears 52 and 54 operate as a single unit. However, the gears 52 and 54 ride freely on the shaft 48 because of the loose relation between the collar 58 and the shaft. Thus the integral relation between the gears 52 and 54 transmits power from the gears 68 to the gears "I8. Gear 44 constitutes an anchor gear for one side of the gears 18 and is attached to the plate [6 as a part thereof. Thus power applied or transmitted to the ring 64 will be twice as much as the power applied to the shaft 48. Thus the shaft 48 will perform heavy duty service.

In Figures 3, 4 and 5 I illustrate a different form of my invention. The differential housing 98 is made up of sections 92 and 94 each having ears 96 bored for the reception of bolts 98 for connecting the sections into a unitary structure. A gear 88 is attached to the end I82 of the section 94 through the medium of bolts I84. Wall I82 includes an opening I88 for accommodating the hub I88 of the gear H8. This gear is keyed at H2 to a power shaft H4, which may be connected with machinery to be operated.

Upon the shaft I I l I loosely mount a gear H6. Between the gears Hi and HQ I mount pinions it. These pinions are loosely mounted on shafts 120 having their inner ends located in bores I22 in a ring I2 3 mounted loosely on the shaft HQ. The outer ends of the shafts [2t lie in recesses 125 in the sections 92 and Ed and are clamped therein as the sections 532 and 9 are drawn into fixed, end to end relation by the bolt 98.

The wall 126 of the section Q2 is provided with an opening 528 for accommodating the hub fill of a gear i552. power shaft 536 which may be connected with the second unit of the machinery to be operated.

To the shaft M l i key a gear E38, as at. Hilly Between the gears 832 and E38 I mount pinions E52. These pinions are rotatably mounted on shafts EM having their inner ends locatedin bores M5 in a ring :58 loosely encircling both shafts HQ- and Gears 532, i313 and the pinions M2 are enclosed within a case Hit compris ing sections 552 and 5%. These sections are recessed at $55 for receiving the outer ends of the shafts Edd which are made secure when the sections Hi2 and i5 3 are clamped together by bolts 258. The wall its of the housing is provided with an opening N52 for the reception of the hub it'll. the housing 559 to the gear l1 it by bolts its.

Housing Hill and the gear 5 M5 are freely related to the shaft ll l and cause half the power to be divided between the gears E83 and 532. As onehalf of the applied power is direct to the shaft 5%, the other half is divided again equally between the shafts H47 and it. Thus the shaft H t will receive seventy-five per cent of 'the power while the shaft 13% will receive twenty-five per cent of the power.

Gear I32 is keyed at iii-l to a second-named gear, an operating connection I fixedly relate the wall its of Without further elaboration, the foregoing will so fully illustrate my invention, that others may by applying current knowledge readily adapt the including means for driving the same, a pair of power shafts extending into the differential housing, a gear keyed to one of said power shafts, an

operating connection between said gear and said differential housing, a gear fixed to the differential housing, pinions arranged in mesh with said between said pinions and said first operating connection, and means keyed to the said other of the power shafts for rotatably supporting said pinions.

2. A device of the type described comprising a differential housing including means for driving the same, a first shaft extending into the differential housing, a second shaft extending into the difierential housing, a gear keyed to the first shaft, two integrally connected gears loosely mounted on the second shaft, pinions between said first gear and one of said pair of integrally connected gears, a driving connection between said pinions and the differential housing, a gear fixedly related to the differential housing, pinions between said last gear and the other of said pair of integrally connected gears, and pivots fixedly related to the second shaft forrotatably mounting said last-named pinions, said gears and said pinions being so constructed and arranged as to divide power unevenly between said first and said second shafts.

, EARL BUSH. 

